For a confidence interval of 5.4 +/- 0.2 find the % confidence level if the standard deviation is 1.3 and n = 100
Q: How large a sample should be selected to provide a 95% confidence interval with a margin of error of…
A: Given Margin of error=8, level of significance ɑ=0.05, standard deviations σ=10
Q: When the standard deviation used to construct a confidence interval for a population mean increases,…
A: Given data: When the standard deviation used to construct a confidence interval for a population…
Q: Julia enjoys jogging. She has been jogging over a period of several years, during which time her…
A: Given,sample size(n)=90sample mean(x¯)=15.61population standard…
Q: How large a sample should be selected to provide a 99% confidence interval with a margin of error of…
A: Given,standard deviation(σ)=50margin of error (E)=10α=1-0.99=0.01α2=0.005Z0.005=2.58
Q: A 95% confidence interval for the mean score of all bowlers based on n = 40 is (131.28, 138.72). The…
A: From the given statement we want to know is it true or false.
Q: A sample of 28 adults attending a country fair determined that the mean age was 34, given that the…
A:
Q: A researcher estimates the 95% CI for a sample with a mean of M = 9.0 and a standard error (sM) of…
A: Obtain the 95% confidence interval for the population mean. The 95% confidence interval for the…
Q: if E=0.07 and population standard deviation=0.8 then find the sample size for 99% confidence…
A: Margin of error(E)=0.07 population standard deviation(σ)=0.8 confidence level=99%
Q: Determine the margin of error for a confidence interval to estimate the population mean with n = 21…
A: n = 21 s = 12.6 confidence interval = 80%.
Q: A survey of 38 men found that the standard deviation is 3.3 and the average number of units for…
A: The sample size for men is 38, standard deviation is 3.3, and mean is 12.8. The sample size for…
Q: The grade point average collected from a random sample of 150 students producing a mean of 2.86.…
A: The population standard deviation σ=0.78 The mean is x=2.86 and the number of samples n=150 The…
Q: for 97% confidence interval is 1.88 2.17 1.65 1.96
A:
Q: The 96% confidence interval for a population proportion is (0.36, 0.48). Using the confidence…
A: Answer: From the given data, The 96% confidence interval of a population proportion is: (0.36, 0.48)
Q: How large a sample should be selected to provide a 95% confidence interval with a margin of error of…
A: Given : Margin of error = 5 α = 0.05 Population standard deviation = σ = 30 zα2 = z0.052 = 1.96
Q: A 95% confidence interval was found to be (14.312, 21.432). What is the margin of error? ME=
A: Answer: From the given data, 95% confidence interval was found to be (14.312, 21.432) lower limit =…
Q: A researcher estimates the 90% CI for a sample with a mean of M = 8.9 and a standard error (sM) of…
A:
Q: Construct a 95% confidence interval for the mean time to prepare a tax return. In the next…
A:
Q: •(v) (a) Find E (Y), E (Y²) and Var(Y). (b) A random sample Y1, Y2, . , Yn is taken from Y - Exp(1).…
A: Here it is given that Y is a random variable which follows Exp(λ) So the pdf of Y is given by,…
Q: At a college, a popular achievement test is used for advanced college placement. Counselors selected…
A:
Q: Construct the confidence interval for the population mean u. c=0.95 x=15.6 and standard deviation =…
A:
Q: vey of 9 social networking sites has a mean of 13.74 million visitors for a specific month. The…
A: As the population standard deviation is not known, we will use t distribution.Degrees of freedom are…
Q: Overweight Men For a random sample of 70 overweight men, the mean of the number of pounds that they…
A: The sample size is 70, the sample mean is 29 and the population standard deviation is 4.3.
Q: GPA of SMSU students is normally distributed with standard deviation (sigma) = 0.8. The average GPA…
A:
Q: udy is conducted to find the mean life of a certain manufacturer's car batteries. A random sample of…
A: As the population standard deviation is not known, we use t distribution. The number of degrees of…
Q: For his senior project jerry wants to know the average gpa of students at his high school. He…
A: Here sample size is n= 21 And mean, X bar = 3.07 Standard deviation, s= 0.78 Confidence interval…
Q: Construct the confidence interval for the population mean c=0.95, x=8.7 standard deviation=0.8 and…
A:
Q: recent survey of 7 social networking sites has a mean of 13.47 million visitors for a specific…
A: We need to construct the 99%99\%99% confidence interval for the population mean μ\muμ. The following…
Q: determine the 95% confidence interval or range in an observed score of 86 if SD is 5.8 and the…
A: 95% Confidence interval is 79.4934 and 92.5066 Explanation: Data given, r=0.82 X=86 SD=5.8 Standard…
Q: A group of students go to a lake that you fished in, and caught 28 adult striped bass fish. The mean…
A: Obtain the 95% confidence interval for the population mean of adult striped bass for that lake. The…
Q: It took an average of 4.4 years for a grove of 57 orange trees to bear fruit. Assume the standard…
A: Solution-: Given: x¯=4.4,n=57,σ=3.7,α=0.04 We find 96% C.I. =?
Q: One year, the mean age of an inmate on death row was 38.1years. A sociologist wondered whether the…
A:
Q: A biologist reports a confidence interval of (3.5,3.9) when estimating the mean height (in…
A: The objective of this question is to calculate the margin of error from a given confidence interval.…
Q: what is the 90% confidence interval of the standard deviation where n= 20 and s=40.5
A:
Q: The standard deviation for a population is sigma = 14.8 . A sample of 21 observations selected from…
A: Here the population standard deviation is given. So, we need to use z critical value in order to…
Q: Find a 99% confidence interval for the population mean age of the Smurfs, if a sample of 50 smurfs…
A:
Q: If a 90% confidence interval for the mean is (75.3 to 80.9), we would reject H0: =70 in favor of…
A: Given, 90% confidence interval (75.3,80.9) i.e. The hypothesis to be tested is given as:
Q: Find a Confidence interval for the true Population Proportions if n = 30, x = 75, and the…
A: From the given information, X=75 and n=30.
Q: How large a sample should be selected to provide a 99% confidence interval with a margin of error of…
A:
For a confidence interval of 5.4 +/- 0.2 find the % confidence level if the standard deviation is 1.3 and n = 100
Step by step
Solved in 2 steps with 2 images
- The slope of a regression line is 0.8, and the standard error of the slope is 0.3. The sample used to compute this regression line consisted of 12 participants. Compute the 95% confidence interval for the slope. Type the upper limit of the confidence interval?Calculate the 95% confidence interval and the 99% confidence interval for a sample of 81 where the population has a mean of 50 and a standard deviation of 6.A recent survey of 10 social networking sites has a mean of 12.67 million visitors for a specific month. The standard deviation was 3.3 million. Find the 95% confidence interval of the true mean. Assume the variable is normally distributed. Use a graphing calculator and round the answers to at least one decimal place. <μ<
- The distribution of study times for first-year students follow a Normal distribution with a standard deviation σ = 78 minutes. Suppose a sample of 431 students found that the mean study time for these students was x¯= 195 minutes per week. Use this to find a 95% confidence interval to estimate the mean study time for all students. We are 95% confident that the mean study time for first-year students is between (Answer) and minutes ( Answer) minutes.A survey taken several years ago found that the average time a person reading a newspaper was 10.8mins. The standard deviation was 3mins. To see whether the average time changed since the newspapers format was revised, the editor survered 36 individuals. The average time the 36 people spent reading the paper was 12.2mins. At $=0.02, is there a change in the average time an individual spends reading the paper ? Find the 98% confidence interval of the mean.identify the t-score for a 90% confidence interval if the sample size is 31. t=
- Find a 95% confidence interval for H given that x = 75.8, s = 19, n = 10.How large a sample should be selected to provide a 99% confidence interval with a margin of error of 14? Assume that the population standard deviation is 55.A random sample of 150 students has a grade point average with a mean of 2.86. Assume the population standard deviation is 0.78. Construct the confidence interval for the population mean, u at the 98% confidence.
- A researcher reports t(5) = +3.00, p < .05 for a repeated-measures research study. The mean sample difference score for the sample was MD = 12. Which of the following is the confidence interval for the population mean difference?If n=25 and the sample standard deviation is 15, construct a 95% confidence interval for the true standard deviation. (Assume the population is approximately Normal).A sample of 20 bags of mulch had a mean weight of 52 pounds with a standard deviation of 3.8 pounds. Find the 95% confidence interval of the true mean. Show all your work for or explain how you obtained your answer in the space provided below.
